KR102674275B1 - Impression coping with extension retainer - Google Patents

Abstract

The present invention relates to an impression coping for an implant procedure used to reproduce the fixture position of an implant installed in the oral cavity in an extra-oral pore work model. More specifically, an extension retainer manufactured in various lengths is used as a common coping body. It relates to an impression coping equipped with an extension retainer capable of taking a stable impression by combining it with each to increase the length of the impression coping within the range allowed by the occlusal diameter.
According to the impression coping according to the present invention, a common coping body for common use is manufactured and an impression coping is manufactured by combining extension retainers with different lengths to compensate for the occlusal diameter to enable stable impression taking. In addition, while implementing an impression coping corresponding to the size of the occlusal diameter, the number of coping bodies of the impression coping can be reduced compared to the past, thereby reducing the economic burden.

Description

Impression coping with extension retainer {IMPRESSION COPING WITH EXTENSION RETAINER}

The present invention relates to an impression coping for an implant procedure used to reproduce the fixture position of an implant installed in the oral cavity in an extra-oral pore work model. More specifically, an extension retainer manufactured in various lengths is used as a common coping body. It relates to an impression coping equipped with an extension retainer capable of taking a stable impression by combining it with each to increase the length of the impression coping within the range allowed by the occlusal diameter.

Impression coping performs the function of moving the fixture position of an implant placed in the oral cavity so that it can be reproduced on a working model outside the oral cavity. Modeling work using such impression coping is very important in determining the accuracy of the pore. For example, a prosthesis manufactured with incorrect information cannot be used as a normal prosthesis because it does not resemble the shape outside the oral cavity and is warped or misaligned when tried on in the oral cavity.

The impression taking method using impression coping is usually carried out at the fixture level. The impression taking method at the fixture level is as follows. The impression coping is attached to the upper part of the installed fixture, a flowable impression material is placed on top of it, and then the wrap analog is fixed to the impression coping placed on the impression body of the tooth model. Afterwards, a tooth model is made by pouring a dental stone, an abutment is fastened to the lap analog with the impression coping removed, and a prosthesis that fits the abutment is manufactured taking into account the relationship between adjacent teeth and opposing teeth.

Various types of impression copings are produced and used depending on the shape and aspect of the installed fixture. Fixtures can be broadly divided into external and internal types. The external type has a hexa structure formed on the outside, and the hexa structure that prevents the rotation of the abutment is located on the outside of the fixture. The internal type is a structure in which a hex is formed on the inside, and the connection part between the fixture and abutment is located on the inside, and is divided into submerged type and non-submerged type.

As various types of fixtures are used, it is necessary to prepare impression coping suitable for each type of fixture. For example, in order to use it in an external type fixture, an impression coping for the external type is required. Also, BLX produced by Straumann is a thermoged type, but the inside of the fixture where the fixture and abutment are connected is hexagonal. Since it is made in a star shape (torx) rather than a star shape, an appropriate impression coping is required.

In addition, the closed tray method used when taking an impression in the oral cavity requires an impression coping with various heights (top and bottom lengths) depending on the thickness of the gums and/or the size of the occlusal diameter. If possible, use long impression copings within the range permitted by the occlusal diameter. The longer the impression coping, the more contact the impression material has with the coping and the more stability it provides. In other words, it is necessary to prepare impression copings with various heights suitable for the thickness of the gums and/or the size of the occlusal diameter. Here, the occlusal diameter refers to the numerical position of the lower jaw relative to the upper jaw when the upper and lower jaw teeth are engaged at the maximum closed position.

In addition, in the case of companies that produce and sell implants, each company combines fixtures and abutments with unique structures, so impression copings tailored to each company were also required.

As described above, conventionally, impression copings with differentiated structures must be provided for each fixture type, gum thickness, occlusal diameter size, and/or implant vendor. For this reason, dental clinics where implant procedures are performed must be equipped with various types of impression copings, making the procedure cumbersome and complicated. In particular, it is a huge financial burden because various types of impression copings must be purchased.

KR 10-2224795 B1, 2021. 03. 02. KR 10-2021-0106724 A, 2021. 08. 31. KR 10-0597392 B1, 2006. 06. 29.

Accordingly, the present invention was proposed to solve the above-described general problems of the related art.

The purpose of the present invention is to provide an extension retainer that can reduce the economic burden by reducing the number of impression copings manufactured and used in response to the types of fixtures and abutments having various structures and/or the occlusal diameter of the patient. It provides an impression coping.

In addition, the present invention is not limited to the above-described purposes, and various other purposes may be additionally provided through the techniques described through the embodiments and claims described later.

The present invention according to an embodiment for achieving the above object includes a common coping body; a coping screw that is inserted into the interior of the coping body through a vertically opened through hole in the center of the common coping body to couple and secure the coping body to a fixture installed in the oral cavity; and an extension holder that is detachably coupled to the upper part of the through hole of the common coping body and extends the height corresponding to the size of the occlusal diameter of the patient from the upper surface of the common coping body. An impression coping provided with an extension holder. provides.

In addition, the common coping body includes a coupling portion coupled and fixed to the fixture through the coping screw; A connection portion formed integrally with the upper part of the connection portion and formed at a height corresponding to the thickness of the patient's gums; And it is formed integrally with the upper part of the connection part, and may include a pillar part protruding from the upper surface of the patient's gums.

In addition, the extension holder includes a holder main body having one or a plurality of retaining grooves formed on the outer surface in the height direction; And it may include a screw coupling part formed on the lower part of the holder body and screwed to the pillar part.

Additionally, the holder body may have a through hole formed in the center.

In addition, it may further include a stopper that is coupled to the upper part of the holder body through a through hole of the holder body and seals the upper part of the holder body.

Additionally, the holder body may be formed in a rod shape.

Additionally, the holder main body may be formed to have the same diameter at the bottom and top, or may be formed in a structure where the diameter becomes smaller from the bottom to the top.

Additionally, protrusions may be formed on the outer surface of the holder body between the retaining grooves, and the protrusions may be formed in a structure in which the diameter of the water width decreases toward the top.

Additionally, the inner diameter of the through hole of the holder body may be constant or may be formed to increase from the bottom to the top.

Additionally, the inner surface of the common coping body may be formed in a structure where the width increases from the bottom to the top.

In addition, in a state in which the extension holder is coupled and fixed to the common coping body, the distance between the head of the coping screw and the lower end of the screw engaging portion of the extension holder is such that a screw groove is formed in the screw body of the coping screw to be screwed to the fixture. It can be formed longer than the length of the part.

Additionally, the head of the coping screw may have an upper diameter larger than the lower diameter.

As described above, according to the impression coping according to the present invention, an impression coping is manufactured by manufacturing a common coping body for common use and combining it with extension retainers having different lengths to compensate for the occlusal diameter. It enables stable impression taking and implements an impression coping corresponding to the size of the occlusal diameter, while reducing the economic burden by reducing the number of coping bodies of the impression coping compared to the past.

That is, according to the impression coping according to the present invention, the height of the common coping body, which is affected by the type of fixture and the thickness of the gum, is limited to a uniform height, thereby significantly reducing the number of common coping bodies used compared to the prior art. Due to the height limitation of the coping body, the overall number of impression copings can be significantly reduced compared to the prior art by compensating for the insufficient height due to the occlusal diameter with an extension retainer coupled to the common coping body.

1 is a cross-sectional view schematically showing an impression coping according to an embodiment of the present invention.
Figure 2 is a cross-sectional view schematically showing the extension holder shown in Figure 1 in a separated state.
Figure 3 is a cross-sectional view briefly showing the common coping body shown in Figure 1.
Figure 4 is a cross-sectional view schematically showing the extension holder shown in Figure 1.
Figure 5 is a cross-sectional view schematically showing an extension retainer having different heights according to the present invention.
Figure 6 is a cross-sectional view schematically showing another example of an extension holder according to the present invention.
Figure 7 is a schematic cross-sectional view to explain the stopper according to the present invention.
Figure 8 is a cross-sectional view briefly showing the inner structure of the extension holder according to the present invention.
9 is a cross-sectional view schematically showing an extension holder according to another example of the present invention.
Figure 10 is a cross-sectional view briefly showing the inner surface structure of the common coping body according to the present invention.
Figure 11 is a cross-sectional view briefly shown to explain another example of a coping screw according to the present invention.

Hereinafter, the advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and is provided to fully inform those skilled in the art of the invention of the scope of the invention. and the present invention is defined by the scope of the claims. In addition, the same reference numerals refer to the same components throughout this specification. Additionally, the size and shape of each component shown in each drawing may be excessive, but this is for convenience of explanation and is not intended to be limiting.

Generally, in order to move the position of an intra-oral fixture out of the oral cavity using the coping body of an impression coping, different heights are required depending on the occlusal diameter. For example, assuming that an impression coping is needed with a 2mm height (length) difference, approximately 5 types of impression copings should be prepared, such as 5mm, 7mm, 9mm, 11mm, and 13mm, based on the upper surface of the fixture. In this case, you must have several of each size, or each according to external type, internal type, ITI type, or specific type from a specific company. Additionally, if the shape of the part connecting the fixture and abutment is different, the impression coping must be prepared accordingly. In addition, when using a closed tray, the length (top and bottom) of the impression coping is as long as possible within the range allowed by the occlusal diameter, the more stable it is.

Therefore, in the present invention, an impression coping is produced by manufacturing a common coping body for common use and combining it with extension retainers having different lengths to compensate for the occlusal diameter. In other words, stable impression taking was possible by increasing the overall length of the impression coping by combining an extension holder with the common coping body of the impression coping. As a result, it is possible to implement an impression coping corresponding to the size of the occlusal diameter and reduce the economic burden by reducing the number of coping bodies of the impression coping compared to the past.

For example, the present invention allows the position information of the fixture to be accurately copied using only one type of common coping body and approximately 4 to 5 types of extension retainers in the task of copying the position of the fixture installed in the oral cavity. We would like to provide In other words, when the internal and external structures of the fixture are different and an impression coping is required accordingly, a type of common coping body is designed and prepared to fit the fixture, and the required length corresponding to the occlusal diameter is manufactured according to the occlusal diameter. Compensation can be made by combining the extension retainer with the common coping body.

Figure 1 is a cross-sectional view schematically showing an impression coping according to an embodiment of the present invention, and Figure 2 is a cross-sectional view schematically showing the extension holder shown in Figure 1 in a separated state.

As shown in Figures 1 and 2, the impression coping 10 according to an embodiment of the present invention is detachably coupled to the common coping body 11 and the upper part of the common coping body 11 and is configured to correspond to the occlusal diameter of the patient. It includes an extension holder 12 that increases the height (top and bottom length) of the impression coping 10, and a coping screw 13 that secures the common coping body 11 to the installed fixture 1.

The common coping body 11 may be formed to have various structures and heights corresponding to the type of fixture 1 installed in the oral cavity (internal or external structure is different for each type) and the thickness of the gum 2 in the oral cavity. In addition, a through hole 11a may be formed in the common coping body 11 at the center so that the coping screw 13 can pass through the center and be coupled and fixed to the fixture 1.

This common coping body 11 includes a coupling portion 111, a connecting portion 112, and a pillar portion 113. At this time, the coupling portion 111, the connecting portion 112, and the pillar portion 113 are artificially divided into the common coping body 11 by position for convenience of explanation, and they integrally form one structure.

As shown in FIG. 1, the coupling portion 111 is a part that is coupled to the inside of the fixture 1 when it is fixed to the fixture 1. The connection part 112 is a part to reflect the thickness (t) of the gum (2). In addition, the pillar portion 113 extends upward from the connecting portion 112 so as to protrude above the gum 2, and is a portion to which the impression body is coupled, and is connected to the coupling portion 111 via the connecting portion 112.

The coupling portion 111 is a part that is inserted into the fixture 1 by the coping screw 13 and directly coupled to the fixture 1, and its shape may vary depending on the inner and outer shapes of the fixture 1. This coupling portion 111 is influenced by the type of fixture (1). Accordingly, the coupling portion 111 must be formed in a structure corresponding to the internal and external structures and depth according to the type of fixture 1.

As shown in FIG. 1, the connecting portion 112 is a portion extending upward from the upper surface of the coupling portion 111 and is affected by the thickness t of the gum 2. Accordingly, the connection portion 112 is formed to have a height (B_h0) corresponding to the thickness (t) of the gum (2) to correspond to the thickness (t) of the gum (2).

Therefore, in an embodiment of the present invention, the coupling portion 111 and the connecting portion 112 are formed to have a structure (coupling structure) and height suitable for the type of the fixture 1 and the thickness t of the gum 2. Ultimately, the number corresponding to the type of fixture (1) and the thickness (t) of the gum (2) is needed.

The pillar portion 113 is a portion that protrudes toward the upper side of the gum 2, and its height is determined depending on the occlusal diameter. The pillar portion 113 according to the present invention maintains the gum even if the structure and height of the coupling portion 111 and the height of the connecting portion 112 are changed in response to the type of fixture 1 and the thickness t of the gum 2. It is formed at the same height based on the upper surface of (2).

That is, in the embodiment of the present invention, the coupling portion 111 and the connecting portion 112 of the common coping body 11 are each affected by the type of fixture 1 or the thickness t of the gum 2. Accordingly, the structure and height are inevitably changed in response to the type of fixture 1 or the thickness t of the gum 2. On the other hand, since the pillar portion 113 is not affected by the type of fixture 1 or the thickness t of the gum 2, it can be formed at a uniform height (B_h1) based on the upper surface of the gum 2. do.

Therefore, in the present invention, when designing the impression coping 10, the common coping body 11 is designed to correspond to the type of the fixture 1 or the thickness t of the gum 2, and then the size of the occlusal diameter is calculated. You only need to consider the parts. In other words, the insufficient height of the common coping body 11 can be compensated for through the extension holder 12 that is detachably coupled to the common coping body 11.

Figure 3 is a cross-sectional view briefly showing the common coping body shown in Figure 1.

1 and 3, a curved surface may be formed on the outer surface 11c of the common coping body 11 to increase bonding force with the impression material used for impression taking and to ensure direction reproducibility. This is to reproduce the direction as is when inserting the impression coping 10 into the impression body.

As shown in FIG. 3, the outer surface 11c of the common coping body 11 includes at least one of a curved surface (a) and a vertical surface (b). The curved surface (a) may be a specific pattern formed regularly or irregularly, continuously or discontinuously in the vertical or circumferential direction of the coping body 11. At this time, the specific pattern may be formed in a wavy or uneven shape with concave portions and convex portions. The vertical surface (b) prevents the impression body from rotating or moving when recombining the impression body and the common coping body (11) to reproduce the pore work model after taking the impression, and is an inclined surface with an upward sloping structure or a downward sloping structure. It may be formed as

FIG. 4 is a cross-sectional view briefly showing the extension holder shown in FIG. 1.

1 and 4, the extension holder 12 is inserted and coupled to the upper part of the through hole 11a formed in the common coping body 11 to increase the height (top and bottom length) of the common coping body 11.

The extended holder 12 may be formed with a through hole 12a penetrating upward and downward in the center, and may be formed on a holder main body 121 having a retaining groove 121a formed thereon, and a lower portion of the holder main body 121. It includes a screw coupling portion 122 screwed to the upper part of the through hole 11a of the common coping body 11.

By increasing the height of the retainer main body 121 by 'S-h1' on the upper surface 11b of the coping main body 11, the height of the common coping main body 11 can be adjusted in response to the size of the occlusal diameter. At this time, the height of the retainer body 121 is formed to a size corresponding to the size of the occlusal diameter.

This extension holder 12 is detachably coupled to the common coping body 11 via a screw coupling portion 122. For this purpose, screw grooves 122a and 11e are formed on the outer peripheral surface of the screw coupling portion 122 and the inner peripheral surface of the through hole 11a of the common coping body 11.

Figure 5 is a cross-sectional view schematically showing an extension holder having different heights according to the present invention.

Referring to FIG. 5, in the extension retainers 12, 22, 32, and 42, the height of the retainer bodies 121, 221, 321, and 421 increases from (a) to (d) in response to an increase in the size of the occlusal diameter. It increases gradually.

The retainer bodies 121, 221, 321, 421 may be uniform with each other, or may be increased to different heights. In the case where the former increases by 1 time, for example, the height (S_h2) of the holder body 221 shown in (b) of FIG. 5 is that of the holder main body 121 shown in (a) of FIG. 5. Twice the height (S_h1), the height (S_h3) of the holder main body 321 shown in (c) of Figure 5 is 3 times, the height of the holder main body 421 shown in (d) of Figure 5 ( S_h4) can be formed 4 times and with a uniform height.

Figure 6 is a cross-sectional view briefly showing another example of the extension holder according to the present invention. (a) shows a structure where the diameter (width) is the same, and (b) shows a structure where the diameter becomes smaller toward the top.

As shown in Fig. 6(a), the holder body 421 of the extended holder 42 is formed to have the same diameter. On the other hand, as shown in (b) of FIG. 6, the extension holder 52 according to another example of the present invention is formed in a structure in which the width of the holder body 521 decreases in the height direction.

As shown in Figure 6, when viewed from above, the extension retainers 42 and 52 have a circular structure. The reason is to remember and reproduce the shape in the height direction through the extension retainers 42 and 52. This is because, if the extension retainers 42 and 52 are formed in an angled shape, the extension retainers 42 and 52 act as an element that hinders the reproduction of direction. Accordingly, the holder bodies 421 and 521 of the extension holders 42 and 52 have a circular rod or tube structure.

As shown in FIG. 6(a), in the extension holder 42, the holder main body 421 has the same diameter. Accordingly, each of the holding grooves 421a is formed to have the same diameter in the height direction, and the protrusion 421b is also formed to have the same diameter. However, in this structure, it is not easy to later separate the impression body from the extension holder 42 or rejoin the impression body during the lab analog work process. For this reason, it is preferable to form the holder body 521 so that the diameter of the holder body 521 becomes narrower in the height direction, as shown in (b) of FIG. 6.

That is, in the present invention, as shown in Figure 6 (b), when forming the holder body 521 of the extension holder 52, it is formed in a structure in which the diameter becomes smaller in the height direction. Accordingly, the retaining groove 521a and the protrusion 521b formed on the outer surface of the retainer main body 521 have a smaller diameter in the height direction, thereby allowing the impression body to be removed from the retainer main body 521 of the extended retainer 52 in the future. It is easy to separate or reassemble the impression body during the lab analog work process.

The retaining groove 521a and the protrusion 521b formed on the retainer body 521 of the extension retainer 52 increase the bonding force with the impression body so that the retainer body 521 does not flow inside the impression body and is stable. ensure that it is maintained. At this time, the holding groove 521a is made of a curved surface that is caught in the height direction of the holding body 521, and may have a continuously connected wave structure.

In addition, when the holder main body 521 has a structure in which the diameter becomes smaller as it goes toward the top, all the retaining grooves 521a are located at the top and bottom centers of the holder main body 521 (1 of the upper and lower heights of the holder main body 521). /2 point), the radius of the retaining groove formed above is smaller than the retaining groove formed below, and the protrusion 521b has a structure whose radius becomes smaller relative to the central axis of the retainer body 521 as it moves toward the top. It can be formed as When viewed from above, the holding groove 521a and the protrusion 521b may have a circular structure around the central axis of the holding body 521.

In this way, a holding groove 521a is formed on the outer surface of the holding body 521 of the extending holding tool 52. Therefore, the holding groove serves to prevent the impression body from rotating or moving when it is coupled with the holding body 521. That is, if a large force is applied while the holding groove 521a and the impression body are combined, the impression body must be separated from the holding groove 521a by the elasticity of the impression body, but the force that separates the impression body from the holding groove 521a is smaller than the force that separates the impression body from the holding groove 521a. When force is applied to the impression body, the impression body does not rotate or move around the holding groove (521a).

And, in the present invention, as shown in Figure 5, the height of the extension retainer is manufactured in various sizes depending on the occlusal diameter. The reason is that it must play a role in registering the bite according to the distance from the opposing teeth. If the distance from the opposing teeth is within 2 mm, the relationship with the opposing teeth is accurately recorded on the impression. Because the length varies, if there are adjacent teeth on both sides of the fixture, the impression itself can register the relationship with the opposing teeth, which has the advantage of not requiring additional occlusion. Additionally, as the length, or height, of the impression coping increases, the contact area with the impression material increases and the sense of stability also increases.

As shown in FIG. 1, the coping screw 13 is inserted through the through hole 11a formed in the common coping body 11 and then screwed to the fixture 1 to fix the common coping body 11 to the fixture 1. A screw body 131 and a head 132 that is formed on the upper part of the screw body 131 and is caught on a step 11f formed between the connection part 112 and the coupling part 111 of the common coping body 11. Includes.

A hexagonal (hexa) or star-shaped (torx) driver hole may be formed in the head 132 to screw the coping screw 13 to the common coping body 11 using a driver. Additionally, the head 132 may have a hexagonal pillar shape.

Figure 7 is a schematic cross-sectional view to explain the coupling method of the stopper that seals the upper part of the extension holder according to the present invention.

As shown in Figure 7, the extension holder 42 has a through hole 42a formed in the center, so the open upper part must be sealed to prevent impression material from flowing into the extension holder 42 when taking an impression. For this purpose, the stoppers 14 and 15 are coupled and fixed. At this time, the stoppers 14 and 15 may be inserted and coupled to seal the upper part of the through hole 42a using an interference fit method (see a) or a screw coupling method (see b).

Figure 8 is a schematic cross-sectional view to explain the inner surface structure of the extension holder according to the present invention.

As shown in (a) of FIG. 8, the extension holders 42 and 42' according to the present invention have the inner surfaces of the through holes 42a and 42a' formed to have the same diameter (d1=d2) in the upper and lower directions, or As shown in (b), it can be formed with different diameters (d3<d4). For example, as shown in (b) of FIG. 8, the through hole 42a' of the extension holder 42' may have a structure whose diameter increases from the bottom to the top. When the through hole (42a') widens in diameter from the bottom to the top, fill the through hole (42a') in the upper part of the extension holder (42') with a temporary filler before taking an impression, and then remove the temporary filler after making an impression. The advantage is that the process is easy. The diameter of the hardened temporary filler becomes narrower towards the lower part of the through hole 42a', making it difficult to enter the lower part even with pressing force, and can be easily removed through the through hole entrance.

Figure 9 is a cross-sectional view briefly showing an extension holder according to another example of the present invention.

As shown in Figure 9, the extension holder 62 according to another example of the present invention has a rod structure without a through hole. As shown in Figure 7, the extension holder 42 with a through hole in the center must be provided with a separate stopper. However, in the case of a rod structure without a through hole, the upper part is sealed and there is no need to install a separate stopper, so the structure can be simplified. there is.

As shown in FIG. 9, the extension holder 62 without a through hole must be separated from the common coping body 11 in order to loosen or tighten the coping screw 13, so the work may be complicated. . However, in the extension holder 42 as shown in FIG. 7, the coping screw ( 13) can be loosened or tightened.

Figure 10 is a cross-sectional view briefly shown to explain the inner surface structure of the common coping body according to the present invention.

As shown in Figure 10 (a), the common coping body (11, 11') according to the present invention has an inner surface (11d) of the through hole (11a, 11a') formed with the same diameter (D1 = D2), or, as another example, As shown in (b) of FIG. 10, they can be formed with different diameters (D3<D4). For example, when formed with different diameters, as shown in (b) of FIG. 10, the diameter may increase toward the top.

Meanwhile, as in the present invention, the purpose of using the penetrating extension holder 12 (an extension holder with a through hole formed in the center) is that the extension holder 12 is combined with the common coping body 11 after making an impression. This is to remove the common coping body (11) from the fixture (1) and connect it directly to the lab analog. Matters to be considered in this structure are shown in Figure 11.

Figure 11 is a cross-sectional view briefly shown to explain another example of the coping screw according to the present invention. Figures 11 (a) and Figure 11 (b) are diagrams showing coping screws having different structures.

As shown in FIG. 11, the lower inner diameter (q) of the screw coupling portion 122 that couples the extension holder 12 with the through hole 12a formed in the center to the common coping body 11 and 11' is the coping screw 13. , 13'), the coping screws (13, 13') must be designed considering the following matters. That is, as described above, in order to reduce the number of coping bodies, the height of the common coping bodies (11, 11') is formed to a limited height, so the extension retainer (12) is coupled and fixed to the common coping bodies (11, 11'). In order to loosen and separate the coping screws (13, 13') in this state, the coping screws (13, 13') must be designed considering the following matters.

When the extension holder (12) is separated from the fixture (1) by loosening the coping screws (13, 13') in a coupled and fixed state without separating the extension holder (12) from the common coping body (11, 11'), the coping screws (13, 13) The distance (x) between the heads (132, 132') of the coping screws (13, 13') and the lower end of the screw coupling portion (122) of the extension retainer (12) so that the screw can be completely loosened and separated from the fixture (1). ) must be sufficiently secured. Otherwise, in the process of separating the coping screws (13, 13') from the fixture (1), the heads (132, 132') of the coping screws (13, 13') are connected to the screw coupling portion (122) of the extension holder (12). ) may become stuck at the bottom and may no longer be released.

Therefore, in order to stably separate the coping screws (13, 13') from the fixture (1) in a coupled and fixed state without separating the extension retainer (12) from the common coping body (11, 11'), the screw body (131) , 131'), the length (y) of the portion where the screw groove is substantially screwed into the screw groove formed in the fixture (1) is formed by the heads (132, 132') of the coping screws (13, 13') and the extension retainer. It must be formed smaller than the distance (x) between the lower ends of the screw coupling portion 122 of (12). That is, the distance (x) between the head (132, 132') of the coping screw (13, 13') and the lower end of the screw engaging portion (122) of the extension holder (12) is substantially in the screw body (131, 131'). The screw groove that is screwed into the screw groove formed in the fixture (1) must be formed to be longer than the length (y) of the area where the screw groove is formed.

The distance (x) between the head (132, 132') of the coping screw (13, 13') and the lower end of the screw coupling portion (122) of the extension holder (12) is calculated from the screw body (131, 131') to the fixture (1). ), for example, a method of lowering the height of the heads (132, 132') of the coping screws (13, 13') to make them longer than the length (y) of the area where the screw grooves are screwed. You can. This method can be implemented by lowering the height of the latching portion where the heads 132 and 132' of the coping screws 13 and 13' are caught inside the common coping bodies 11 and 11'. For example, a method of lowering the locking protrusion is to make the upper diameter of the head 132' of the coping screw 13' larger than the lower diameter to serve as a locking protrusion on the side of the head, as shown in Figure 11 (b). There is a way.

Meanwhile, as shown in Figure 11 (b), in order to compensate for the coupling force due to the decrease in the distance of the screw-coupled part between the coping screw 13' and the fixture 1, the neck portion of the coping screw 13', that is, the screw body At the upper part of (131'), screw threads may be further formed to be screwed together with approximately 2 to 4 screw threads formed inside the common coping body 11'. Through this, it is possible to compensate for the coupling force caused by a decrease in the distance of the area where the coping screw 13' and the fixture 1 are screwed together.

Hereinafter, the effects of applying impression coping according to an embodiment of the present invention will be described.

For example, in order to make an impression of an 'A' type fixture, one type of common coping body that can be combined with the 'A' type fixture, and 4 to 5 types of extensions with different heights (lengths), as shown in Figure 5. Maintenance is required. Also, when making an impression of a 'B' type fixture, you only need to prepare an additional common coping body that can be combined with the 'B' type fixture, and the extension holder can be used to make an impression of a 'A' type fixture. You can use the same extension tool used during the procedure. When making an impression for a 'C' type fixture, you can additionally prepare one type of common coping body, and also use the same extension holder used for the 'A' type.

In this way, when the impression coping according to the embodiment of the present invention is applied, when making an impression using only the 'A' type fixture, only a coping body suitable for the 'A' type and a few types of extension holders having different lengths are used. Just prepare. In addition, when impressions are taken using additional fixtures of type ‘B’, type ‘C’, and type ‘D’, the structure can be combined with type fixtures of type ‘B’, type ‘C’, and type ‘D’. All you need to do is prepare an additional coping body.

On the other hand, in the impression coping structure according to the prior art, that is, the impression coping structure provided with a coping body designed to have a height corresponding to the size of the occlusal diameter, for example, there are 10 different heights corresponding to the size of the occlusal diameter. Assuming that a coping body with different lengths is required, coping screws capable of fixing 10 coping bodies with different lengths must be prepared. In other words, in the case of an 'A' type fixture, 50 coping bodies are required, and in this case, 50 coping screws are required. In addition, in the case of ‘B’ type, ‘C’ type, and ‘D’ type fixtures, an additional 50 coping bodies must be prepared each.

However, when designed like an impression coping according to an embodiment of the present invention, the size of the occlusal diameter is not reflected and the coping body is designed to have a uniform height, so that in the case of an 'A' type fixture, 10 coping bodies and an extension retainer are used. 50 pieces are required, and in the case of 'B' type, 'C' type, and 'D' type fixtures, the extension retainer is commonly used, so only 10 additional coping bodies need to be prepared, so compared to the prior art, the coping body needs to be prepared. It can provide the advantage of reducing the number of main bodies.

Therefore, in the present invention, the common coping body 11 plays a role of remembering and reproducing the left and right directions, and the extension holder 12 plays a role of remembering and reproducing the height direction. In addition, even if impressions of various types of fixtures are taken by designing the extension holder 12 as shown in FIG. 5, all that needs to be additionally prepared is only one type of impression coping body suitable for the fixture type, so from a dental standpoint, It is easy to manage and simple to work with.

As described above, the technical idea of the present invention has been described in detail in preferred embodiments, but the preferred embodiments are for explanation and are not intended to limit the invention. As such, an expert in this technical field will understand that various embodiments are possible through combination of embodiments of the present invention within the scope of the technical idea of the present invention.

1: Fixture 2: Gums
10: Impression coping 11, 11': Common coping body
11a, 11a': through hole 11b: top surface
11c: External surface 11e: Screw groove
12a, 42a, 42a': Through hole 13, 13': Coping screw
14, 15: stopper 111: coupling part
112: connection part 113: pillar part
121a: Retention groove 122: Screw joint
122a: Screw groove 131, 131': Screw body
132, 132': Head 421a, 521a: Maintenance groove
421b, 521b: Protrusion
121, 221, 321, 421, 521: Holder body
12, 22, 32, 42, 42', 52, 62: Extension retainer

Claims (12)

Common coping body;
a coping screw that is inserted into the interior of the coping body through a vertically opened through hole in the center of the common coping body to couple and secure the coping body to a fixture installed in the oral cavity; and
An extension holder that is detachably coupled to the upper part of the through hole of the common coping body and extends the height from the upper surface of the common coping body in accordance with the size of the patient's occlusal diameter; Including,
The common coping body is,
A coupling part coupled and fixed to the fixture through the coping screw;
A connection portion formed integrally with the upper part of the connection portion and formed at a height corresponding to the thickness of the patient's gums; and
A pillar portion formed integrally with the upper part of the connection portion and protruding from the upper surface of the patient's gums; Including,
The extension retainer is,
A retainer body having one or a plurality of retaining grooves formed on the outer surface in the height direction; and
a screw coupling portion formed on a lower portion of the holder body and screwed to the pillar portion; Including,
The holder body is formed in a structure in which the lower and upper parts are formed with the same diameter, or the diameter becomes smaller from the lower part to the upper part,
Impression coping with extended retainer.
delete delete According to claim 1,
The holder body is an impression coping provided with an extension holder having a through hole formed in the center.
According to claim 1,
Impression coping provided with an extension holder further comprising a stopper coupled to the upper part of the holder body through a through hole of the holder body and sealing the upper part of the holder main body.
According to claim 1,
The holder body is an impression coping provided with an extension holder formed in a rod shape.
delete Common coping body;
a coping screw that is inserted into the interior of the coping body through a vertically opened through hole in the center of the common coping body to couple and secure the coping body to a fixture installed in the oral cavity; and
An extension holder that is detachably coupled to the upper part of the through hole of the common coping body and extends the height from the upper surface of the common coping body to correspond to the size of the patient's occlusal diameter; Including,
The common coping body is,
A coupling part coupled and fixed to the fixture through the coping screw;
A connection portion formed integrally with the upper part of the connection portion and formed at a height corresponding to the thickness of the patient's gums; and
A pillar portion formed integrally with the upper part of the connection portion and protruding from the upper surface of the patient's gums; Including,
The extension retainer is,
A retainer body having one or a plurality of retaining grooves formed on the outer surface in the height direction; and
a screw coupling portion formed on a lower portion of the holder body and screwed to the pillar portion; Including,
A protrusion is formed between the retaining grooves on the outer surface of the holder body, and the protrusion is formed in a structure in which the diameter becomes smaller toward the top,
Impression coping with extended retainer.
Common coping body;
a coping screw that is inserted into the interior of the coping body through a vertically opened through hole in the center of the common coping body to couple and secure the coping body to a fixture installed in the oral cavity; and
An extension holder that is detachably coupled to the upper part of the through hole of the common coping body and extends the height from the upper surface of the common coping body to correspond to the size of the patient's occlusal diameter; Including,
The common coping body is,
A coupling part coupled and fixed to the fixture through the coping screw;
A connection portion formed integrally with the upper part of the connection portion and formed at a height corresponding to the thickness of the patient's gums; and
A pillar portion formed integrally with the upper part of the connection portion and protruding from the upper surface of the patient's gums; Including,
The extension retainer is,
A retainer body having one or a plurality of retaining grooves formed on the outer surface in the height direction; and
a screw coupling portion formed at a lower portion of the holder body and screwed to the pillar portion; Including,
The inner diameter of the through hole of the holder body is formed in a structure that is constant or increases from the bottom to the top,
Impression coping with extended retainer.
Common coping body;
a coping screw that is inserted into the interior of the coping body through a vertically opened through hole in the center of the common coping body to couple and secure the coping body to a fixture installed in the oral cavity; and
An extension holder that is detachably coupled to the upper part of the through hole of the common coping body and extends the height from the upper surface of the common coping body to correspond to the size of the patient's occlusal diameter; Including,
The common coping body is,
A coupling part coupled and fixed to the fixture through the coping screw;
A connection portion formed integrally with the upper part of the connection portion and formed at a height corresponding to the thickness of the patient's gums; and
A pillar portion formed integrally with the upper part of the connection portion and protruding from the upper surface of the patient's gums; Including,
The inner surface of the common coping body is formed in a structure where the width increases from the bottom to the top,
Impression coping with extended retainer.
According to claim 1,
In a state in which the extension holder is coupled and fixed to the common coping body, the distance between the head of the coping screw and the lower end of the screw coupling portion of the extension holder is the portion of the screw body of the coping screw where a screw groove that is screwed to the fixture is formed. Impression coping with an extension retainer formed longer than the length.
Common coping body;
a coping screw that is inserted into the interior of the coping body through a vertically opened through hole in the center of the common coping body to couple and secure the coping body to a fixture installed in the oral cavity; and
An extension holder that is detachably coupled to the upper part of the through hole of the common coping body and extends the height from the upper surface of the common coping body to correspond to the size of the patient's occlusal diameter; Including,
The common coping body is,
A coupling part coupled and fixed to the fixture through the coping screw;
A connection portion formed integrally with the upper part of the connection portion and formed at a height corresponding to the thickness of the patient's gums; and
A pillar portion formed integrally with the upper part of the connection portion and protruding from the upper surface of the patient's gums; Including,
The head of the coping screw has an upper diameter larger than the lower diameter,
Impression coping with extended retainer.